Exam 3: Cellular Structure, Proteins, and Metabolic Pathways

Which organelles would you expect to be especially numerous in cells that utilize oxygen to generate a great deal of energy in the form of ATP?

What is the term for the segments of primary RNA that are cleaved and discarded by spliceosomes?

The enzyme carbonic anhydrase catalyzes the catabolism of H₂CO₃ to H₂O and CO₂.

What are the products of glycolysis under anaerobic conditions?

Which of these are functions of the Golgi apparatus?

When a reversible chemical reaction is at equilibrium,

One function of integral membrane proteins in the plasma membrane of cells is to form channels to allow passage of nonpolar solutes into the cell.

A solution containing proteins of a particular type is exposed to the same concentrations of ligands X and Y, but the percent saturation of molecule X is greater than the percent saturation of molecule Y. Which is most likely to be a true statement?

Once protein synthesis is completed, the protein that was synthesized may undergo further changes prior to its secretion or use within the cell.

ATP is

Which of the following is not true of the cytoskeleton?

Glucose is not considered an essential nutrient because it is not essential for good health.

The major lipids in cellular membranes are phospholipids.

Allosteric modulation of a protein involves noncovalent binding of a ligand to a regulatory binding site.

Most of the energy stored in the body is in the form of glycogen.

The site where most of the ATP is generated in a cell is the

Which of the following metabolic pathways can proceed in the absence of oxygen?

The only role of modulator molecules is to enhance the binding affinity of the functional site of an allosteric protein.

Transcription factors activate or repress the transcription of specific genes by binding to regions of DNA that interact with the promoter region of a gene.

Before an amino acid can be broken down for energy: